Electrical measuring instrument.



c. A. 1200015. ELECTRICAL MEASURWG lNSTRUMENT.

APPLICATIONIILED DEC. 4, 1915.

1 06,406. Patented Nov. 28, 1916.

TN 555? 7 INVENTOR Clarence A. Boddze;

' ATTORNEY UNITED ATES in ie; 'iiobpln, OF PITTSBURGH, PENNSYLVANIA? Ajssmnon 'no wns'rlnqnousn ELEUKRIG AND ANUEA TURI NQ COMPANY, -A.- CORPORATION OF; PENN$YLVANIA;

' ELneTnIoAtiLMEAsUnInG INsTnUnEnT.

Specification of Letters Patent. V

Bje' 1tknown that I; CLAnnxcn, A. 1300mm, a citizen"df'tlie'United States, and i1 resident of Pittssbn'uglnin the-county of Allegheny and State .of Pennsylvania, have invented a new. and useful Improren'ient in Electrical 'Measnring Instruments, of. which jthei following is a specification. iMyn'ivent on relates to GlQLt-l'lChl-II'N3HSU1' lo-111g"instruments and particularly to niaxi-- rnuni-Llemand "Wattmeters.

- "l l1e objectof l'ny invention-1s to provide metal" of the-above unheated character F ha ing nioans for periodically resetting a portion of the mechanism thereot 1n order to obtain :1 true indication of themaxinnnn demand.

*lWveopending U; S. application, Serial ine n'b maybe periodically open-eireuitecl to'permit one of the a'rmatnres to retlirn .to

its initial position. This accomplished 'liyhthle use 'Of'- a contact-making-and breaki ii'ig device thatis' aclapl.iail= to o'pel'r the cir 'filu'it'j'wlien the to'r'qne lot-the control sprin g issnbstantially the 'san'1e as the torque of tlie flli'r' nntnre, The balantierltolrqile condi- 'tion "in obtainecl' reeurrently, and hence,

r 'rt iiresl i v Fignfie '1 of the accompanying drawings i is a diagrammatic View, partially in elevai -tion anrl p'ar'tiallyin nection', '01 :1 maximum- Application filed December 4, 11515." Serial No. 65,012.

1e 'ningneliylable core.

as a coni enient'and desirable ti ming roclfor the resetting of'onc O'fithe arrn'a- Patented Nov. 28; Y Y

memberll "of a maximumnlcmand meter '7.

.lheseu0ndary nintli-ngB of the potential t1-:i'n"s fo1"|r1e1" 3 is ominectetl to the potential .ivinilings J'that also surround.portionsmf the 'n1agneti'/ a'lile core nlember lx A -con,- tact-makingand breaking cleviee 10 is @011- .neeted in cir'ouit' with Itl-io windings S'and 9 for the purposeot' -oontrolling the cirenit thus] constituted and, eonseqnenfly, for

effecting theresetti-ng of the motor, as herein after more in lly :set' fort] 1.

'Tlie. n 1eteris -])l0\'lll0(l \vitli a in'ain -arnnit.ni"e 11' and an auxiliary armature 12 that are disposed, in the air-"gap 13 "of "the; magnet im'ible core nn-inl. ei'- (sand aresnb 7O jectcd "to similaractuating forces in accordancewith theenergy whichtraverses the \vinclings- 5 a-ntlQf The auxiliary 'arinature '12 is mounted on a shaft 14 that ina'lSo'm-o1 rideil with an eccentric l5 which-is aila-plioi'l' to oscillate'a double palette-16 tli e. 'tee'th of which are adapted to engagothe'teotli oi an esoaywn'ient wheel 17. The \vl1eel'17 is mounted on a shaft 1 also pun-"idealwith a pinion 19. The main armatiire-ll monntgal on .a shaft that has a gear wheel Q-lyunearm 22 of .thecolr' tact-making and breaking din-"ice 1U *ant'l mine al ot'a control springQi-Sfalso mounted thereon,thuotheir end of the'eon'trol Spring lasing alt-neheil to ii. Htation'ary luQll'lbrfZ-i.

- A slejeve-zfi-thatloosely sn'rroiii-i'rlsthesha ft-" mist-1 provi'ilecl with a ratchet wlua'al m ma a gear .wheel- 2-7. The pin-ion 111'isai'lajiteil;

to'engiigethe gmir'tvheelififl, aml the geati wheel 211aa laq ted to engage agear wheel 28 that is mounted on a 'slmit 2!) A, second member 22. The member 22 is provided with a bracket or L-shaped projection 42 for the purpose of actuating the lever 37 when it is moved in a clock-wise direction. The lever arm 37 is provided with a relatively heavy member 43 on one end thereof for'purposes hereafter more fully set forth. ll hen the eonta'ct members 36 and ID are engaged, and current traverses the circuit 1, the armature 12 will rotate in accordance with the, energy traversing, the circuit, and the armature 11 will tend to turn against the action of the spring 23 with a speed that is controlled by the speed of the armature 12. That is, the armature 11 moves the arm '22 which compresses the spring 41 to thereby move the arm 37, but the degiee of movement of the arm 37 is controlled by the armature 12 through the pawl 38, the

ratchet wheel 26, gear wheel 27, pinion 19, the escapement wheel 17 and the double palette 16. \Vhen the armature 11 turns, it actuates the pointer 35 through the gear wheels 21, 28, 30 and 31 and the dog 33 to thus indicate the maximum demand of energy traversing the circuit 1 during predetermined time intervals.

Since it is desirable to recurrently reset the armature 11, the spring .41 is of such proportions that, when the torque of the sp mg 23 is equal to the torque of the armature 11, the spring 41 is permitted to expand to effect disengagement of the contact members 36 and which opens the circuit of the potential winding 9 and thus removes the actuating force from the armature. When the circuit of the winding 9 is interrupted, the spring 23 turns the arm 22 which, through the bracket 42, carries the'arm- 37 in a clock-wise direction until the arm 22 engages the stationary member 24. \Vhen the armature 11 is being returned to its initial position, the arm 37 generates a momentum because of the movement of the relatively heavy member 43 whichcompresses the spring 41 a sufiieient amount,

after the arm 22 has engaged the stationary member 24, to effect engagement of the contact members 36 and 40 and to cause the pawl-38 to enga a tooth that will retain the contact mem rs 36 and 40 in engagement. Thus,'the circuit of the potential winding 9 is again completed and the armature 11 will again be ermitted to rotate counter clock-wise unti the torque generated thereby is neutralized by the torque of the spring 23. When the armature 11 is returned to its initial position, the dog 33 is also returned to its initial positidn, leaving the pointer 35 to indicate the maximum demand. The pointer will remain in this position until it is either reset manually or advanced by the mechanism when the maximum demand is increased. A

My invention is not limited to the particular structures illustrated, as many modifications may be made therein without departing from the spirit and scope of the invention as set forth in the appended claims.

I claim as my invention:

1. In an electrical-measuringinstrument, the combination with two movable armatures and a single means for simultaneously actuating the same, of means interposed between the said armatures whereby one con trols the operation of the other, means for yieldingly opposing the movement of one armature and for returning the said armature that is opposed in its movement to its initial position when its resultant torque is substantially zero.

2. In an electricalmeasuring instrument,

the combination with two movable arma-.

tures and a single means for simultaneously actuating the same, of means interposed between the said armatures whereby one controls the operation of the other, means for opposing the movement of one armature and means for o n'circuiting the actuating means when he torque of the armature that is opposed in its movement reaches a predetermined value.

3. In an electriical-measuring instrument, the combination with two movable armatures and a single means for simultaneously actuating the same, of means interposed be tween the said armatures wherebvone controis the other, resilient means for retarding the operation of one armature, and means controlled by the said retarded armature for o n-clreuiting the actuating means when t e torque of the resilient means neutralizes the torque of the armature.

4. In an electrical-measuring instrument, the combination with two movable armatures and a single meansufor simultaneously actuating the same, of a spring for opposing the operation of one armature, and means controlled by the spring-opposed armature for openmrcuiting the actuating means when the to no of'the spring neutralizes the torque o the armature.

5. In an electrical-measuring instrument, the combination with twojarmaturea and. a single-means for simultaneousl actuating the same, of means interposed tween the armatures whereby one controls the operation of the other, and means for periodically returning one of thejarmatures to its initial position.

6. A wattmeter comprising two armaturemembers, means for simultaneously applying similar actuating forces thereto, means whereby one of the armature members controls the operation of, the other armature members, and means torperiodically interrupting the actuating forces. a

7. A wattmeter comprising a ma n and an auxiliary armature, means for simultaneously actuating the name, a spring for opposing the operation of the main armature,

means actuated by the auxiliary armature for controlling the operatlon of the main armature, a contact-making and breaking device actuated by the main armature for controlling the circuit of the actuating means to thereby permit the spring toperiodically reset the main armature, v=

'8. A wattmeter comprising a main and an auxiliary armature, means for simultaneously actuatingthe same, a spring for 0pposing the operation of the main 'armature,=- means actuated by the auxiliary-armature for controlling the oplerationof themain I armature, acont'act-mahing .and breaking device actuated by the n1ain .armat-ure for controlling the circuit of the actuating means to thereby permitthespring to reset the main armature lii'hefn the torque of tl'lfl IiltllIl armature is equal to the torque of the sprin 9. A wattmeter comprising a main andanauxiliary armature, electromagnetic means for simultaneously actuating the armatures, a spring for opposing theoperation of the main armature, means actuated by theauxilia-ry armature for controlling the forward operation of the main armature, and a con tact-malcing and breaking device actuated by the main armature and adapted to open was circuit of the electromagnetic means" "-ivhen the torque ofthe inain armature is ineutralizerlby'z-thetorque of the spring. to-

A tactqnaking; and breaking .clevice actuated 0 *mlned value.

tures'and'means for simultaneously, actuattl e'reby permit the main armature to return to its initial position.

IQi A yyattmeter comprising a mainand'an I an); for" 'ry' armature, electromagnetic means "simultaneously actuating the armatures, a spring for opposing the operation of the main armature, means actuated by the auxiliary armature for controlling the forward operation of the 'main .armaturm and aconby the main armature and adapted to open the circuit of .the electromagnetic means when the torque of the' main armature is neutralized by the torque of the spring to thereby permit the main armature toreturn to its initialposition, said contact-'malrin'g and breaking 'device beingadaptecl to close the circuit. after. the, main armature has returned to lts initial'position.

11; In an electrical measurmg instrument, the combinatnmwith. two movable armatures and means for s multaneously actuatingthe same, of means whereby one armature controls the movement of the other,:.

means for yieldingly opposing the operation of 'one 'arn,1atfire and means for; open-cirterniinecl conditions.

the, combinationv wan-two limiable armailigthe same, of, means; whereby one armavtare. controls' members, and means for -1'endering;s"the cuiting the actuating means unclerprede 12. .In an electrical measuring instrument,

the movement 'of' the other,

means for y-i'eldi ngly op19osing;the= operation: of one armature,'-and meansforiperiocheall open-circuitn g the actuating iueans iun'der predetermined conditions.

13. In arr-electrical measuring instrument; the :combination with two movable armaturesanda single means for simultaneously actuatinglhe same, of meanswhereby. one aru'iaturc controls the movement ot-ithe.

other, means ifor yieldingly= opposing the. OPQIittlOIl of one armature, and meansufor periodicallyrendering-theactuating means ineffective. y

1 l4. Ina measuringinstrument theicombir nation with two movable-members and-z means for simultaneously actuating vathe same, of means whereby one movable merm her controls the other, a spring'foryoppos' mg the operation 01. one of; the. movable:

initial ,position when the actuating means is rendered ineffective.

16. In a measuring instrument, the come bination with two movable members and means for siim ltaneously actuating" the same, of means whereby one member controls the other, means for yieldinglyoppos ing the movementof one member,- and means for open circuiting the actuating means when the torque of the member that is opposed in its movement reaches a pred'eten 17. In a measuring instrument, the conlbination with two. movable -men1bers, an (l means for simultaneously. and ndependently actuating the same, of means whereby one controls the mo yement 'oftheother, a s'prillg for opposing. the operat on pf one of the movable members, and 4 means "for peri0d i.

cally. rendering the actuating means inefi'ec-fl tive to. permitthe spring to return-one of. the mm able-members to its-initial position. -1 8 ..-ln a measur ng instrument; the combination with an armature means-for actuatingthe armature, and-an indicating mechanism adapted to be actuated bythe armature,

" of. a sprmg for opposing the operation oi the armature, and" means for periodically open circuitingtth actuatm means to permlt'theresett ng of a portion th indicating mechanism;

119 In an e leetrica l v measuring ment, the combination with a movable mem her and means for. actuating; the some,

means for yieldingly opposing the operation of the movable member, and means for opencircuiting the actuating means under predetermined conditions to permit the movable member to return to its initial position;

20. In an electrical measuring instrument,

the combination with a movable member and means for actuating the same, of means for yieldingly opposing the operation of the movable member, means for controlling the operation of the movable member, and means for open-circuiting the actuating means under predetermined conditions to permit the movable member to return to its initial ditions to permit the spring to reset a portion of the indicating mechanism.

22. In a measuring instrument, the combination with two movable members and means for actuating the same, of means whereby one member controls the other, means for yieldingly opposing the movement of one member, and means for opencircuiting the actuating means when the torque of the member that is oppomd in its movement reaches a predetermined value.

23. In an electrical measurin instrument, the combination with a move le armature and means for actuatingthe same, of means forv controlling the movement of the armature, means for opposing the operation of the armature, and means for periodically rendering the actuating means ineffective to permit the said opposing means to reset the said armature.

In testimony whereof, I have hereunto subscribed my name this th day of Nov.

CLARENCE A. BODDIE. 

